RENO, Nev. (MyNews4.com & KRNV) -- There is new information on a double homicide in Washoe Valley that ended with a high speed chase, death of the suspect, and seven law enforcement officers placed on administrative leave.

In a news conference on Wednesday, Washoe County Undersheriff Tim Kuzanek identified the suspect as Anthony Nelson. "Nelson had just finished serving time for sexual assault in Arizona and was placed on parole June 2nd."

Kuzanek said soon after the release, Nelson's GPS tracking device went dark. "The Arizona probation officer attempted to contact him to have him return to the office, but he did not respond to calls."

The following day, the probation officer issued a warrant out for Nelson for violating his parole. Nelson did not surface until June 13. This time, authorities linked him to call from a home in the 4800-block of Leo Bingo Court in Washoe Valley. "We received a 9-1-1 call from a man who reported a shooting," said Kuzanek.

When officers arrived, they found the caller with superficial wounds and his 68-year-old wife dead, from a single gunshot wound.

Kuzanek said the man and his wife had gone to check on the welfare of a 70-year-old woman who lived at the residence. Authorities think that is when Nelson confronted the couple and gunfire erupted. Investigators said they found the body of the 70-year-old woman inside the home, dead from stab wounds.

Soon after the shooting, authorities said Nelson took off in the 70-year-old woman's white Jeep Cherokee. Once the car was spotted by officers, a chase ensued that ended at Sand Mountain, where Nelson was shot and killed by officers. Those officers were placed on routine, administrative leave.

A multi-agency investigation is now underway. Kuzanek said there was a white Nissan Frontier truck, with Arizona plates found in the garage of the Washoe Valley home. Authorities say they traced the plates to a man living in Tuscon, Arizona. That discovery led them to the body of 32-year-old Quincy Gangwer, a registered sex offender. Authorities say some of Gangwer's possessions were found on Nelson.

Since the discovery of the deaths, detectives say they have learned the Nissan truck was seen at the Washoe Lake State Park campground the day before, and the day of the Washoe Valley homicides.

Authorities are asking for the public's help. They are trying to determine if other crimes have been committed, establish a motive and determine what relationship, if any, Nelson had to the victims. If you have information on Nelson or the truck, you are asked to contact the Washoe County Sheriff's Office Detective Division at 775-328-3320, or Secret Witness at 775-322-4900.